on - edited on by
Kureli Sankar
- Benefits
- Documentation
- Prerequisites
- Image Download Links
- Limitations
- Supported Platforms
- License Requirements
- Topology
- Step-By-Step Configuration
- Configure SD-WAN Component VMs
- Configure Controller IP Addresses
- Configure Controller Certificates
- Verification
- Troubleshooting
- Adding a WAN Edge to the SD-WAN Fabric
Benefits
Cisco’s software-defined wide area network (SD-WAN) solution allows user to quickly and seamlessly establish an overlay fabric to connect an enterprise’s data centers, branch and campus locations, as well as colocation facilities in order to improve the network’s speed, security, and efficiency.
Documentation
This configuration example is designed to be used in combination with the official Cisco SD-WAN End-to-End Deployment Guide.
Prerequisites
This configuration guide assumes that the following has already been setup and configured:
- UCS server with at least the following hardware resources available:
- vManage
- 2 CPU
- 32GB Memory
- Disk 1: 30GB
- Disk 2: 100GB
- vSmart
- 2 CPU
- 4 GB Memory
- Disk 1: 10.5GB (Approx. image size)
- vBond
- 4 CPU
- 2GB Memory
- Disk 1: 10.5GB (Approx. image size)
- VMWare ESXI v6.0+ instance for managing VMs and VM networks:
- One virtual network and switch for VM management and
- One virtual network and switch for SD-WAN
- Datastore(s) configured with at minimum 500GB
- Workstation with network access to UCS server and controllers, with access to a certificate-signing server/software, such as xca.
- vManage
Image Download Links
vEdge (vBond), vManage, vSmart:
https://software.cisco.com/download/home/286320995/type
Limitations
This configuration example only covers the process of installing the SD-WAN controller software images on a VMWare ESXI instance, establishing the transport and management networks for the three controllers to communicate, and ensuring that each controller has a valid certificate installed. This configuration does not go over the process of creating/applying configuration templates or adding edge devices, through vManage.
Supported Platforms
The Cisco SD-WAN Solution is compatible with all Cisco ASR 1000 Series Routers, ISR 1000 Series Routers, ISR 4000 series routers, vEdge Routers, CSR, and ISRv.
License Requirements
A Cisco DNA Essentials license is necessary in order to implement the SD-WAN solution.
Topology
This diagram describes the topology of the configuration which is covered by this setup guide.
Step-By-Step Configuration
Configure SD-WAN Component VMs
- Navigate to your VMWare ESXI management interface, and select “Virtual Machines” then click “Create/Register VM”
- For vManage, click “Deploy a virtual machine from an OVF or an OVA file"
- Enter a name for your vManage instance, and select the downloaded file for vManage
- Select the datastore where the VM is going to be stored
- Select the VM management network for the VM Network, and select “Thick Provisioning” for Data Provisioning. Uncheck “Power on Automatically”
- Click “Finish” to register the vManage VM
- Navigate to the left pane and click on "Networking" to add an additional Network Adapter. Click on "Add port group"
- In the pop-up window, type "SD-WAN" as a name of the New Port Group and click on "Add"
- Navigate to the Virtual Machines and right click the vManage VM and click “Edit Settings
- Click “Add Network Adapter” and select the defined SD-WAN network for Network Adapter 2
- Click "Add Hard Disk" and select "New Standard Hard Disk"
- Update Hard Disk 1's size to be 30GB, and update Hard Disk 2's size to be 100GB, so that vManage has sufficient space to store all controller logs
- Click "Save"
- Repeat steps 1-8 for vSmart and vBond, using the downloaded OVA file for each. When configuring the VMs, ensure that the first network adapter is the VM management network, and the second network adapter is the SD-WAN network
Configure Controller IP Addresses
- Start all three VM instances for vManage, vBond, and vSmart
- Log in to each VM instance using the default username/password: admin/admin
- Type the following commands to setup vManage, vSmart and vBond system configurations:
| Command | Purpose | |
| Step 1 | vmanage# configure terminal | Enters global configuration mode |
| Step 2 | vmanage(config)# system | System parameter information |
| Step 2.a | vmanage(config-system)# host-name name | Specifies name of the device |
| Step 3 |
vmanage(config-system)# system-ip IP Address |
An IP address used internally by the network to identify each device. This is similar to a router ID. These must be private addresses that are unused anywhere else in the network.
Example: vManage: 1.1.1.1 vSmart: 1.1.1.2 vBond:1.1.1.3 |
| Step 4 |
vmanage(config-system)# organization-name <Press Enter> (<Organization name>): name |
Name of your organization. It must be identical on all the devices in your overlay network, and it must match the name in the certificates for all network devices
Example: (<Organization name>): Cisco systems |
| Step 5 | vmanage(config-system)# sp-organization-name
<Press Enter> (<Organization name>): name |
Name of your service provider. must be identical on all the devices in your overlay network, and it must match the name in the certificates for all network devices
Example: (<Organization name>): My Service Provider |
| Step 6 | vmanage(config-system)# site-id number |
Numeric identifier of the site in the overlay network. The site ID must be the same for all devices that reside in the same site (i.e. site ID remains the same for vManage, vSmart & vBond).
Example: site-id 100 |
|
Step 7.a
Step 7.b |
vmanage(config-system)# vbond IP address (for vManage &vSmart only)
vmanage(config-system)# vbond IP address local vbond (for vBond only) |
IP address of the vBond orchestrator. Must be a public IP address.
Example: vbond 128.x.x.x
Configure this device to act as the vBond orchestrator.
Example: vbond 128.x.x.x local vbond |
| Step 8 | vmanage(config-system)# commit | Activate the commands in the configuration |
A summary of the above commands, with an example configuration:
configure terminal hostname vmanage system-ip 1.1.1.1 organization-name Cisco sp-organization-name MyServiceProvider site-id 100 vbond 128.0.0.3 commit
4. Once the controllers are setup, configure the transport VPN on vManage, vSmart and vBond with the help of the following commands:
| Command | Purpose | |
| Step 1 |
vmanage# conf t vmanage(config)# vpn 0 |
This is the WAN facing interface i.e. transport VPN |
| Step 2 |
vmanage(config-vpn-0)# interface eth0 (for vManage and vSmart)
vbond(config-vpn-0)# interface ge0/0 (for vBond only) |
Enters the configuration mode for an Ethernet WAN interface |
| Step 3 |
vmanage(config-interface-eth0)# ip address IP address (enter IP address with a CIDR prefix. Example: 128.0.0.5/24 )
vmanage(config-interface-eth0)# no shut |
Sets the IP address for the specified Ethernet interface
Enables the Ethernet interface, changing its state from administratively down to administratively up |
| Step 4 |
vmanage(config-interface-eth0)# tunnel-interface
vmanage(config-tunnel-interface)# allow-service all
vmanage(config-tunnel-interface)# commit vmanage(config-tunnel-interface)# exit vmanage(config-interface-eth0)# exit
For vBond: vbond(config-interface-ge0/0)# tunnel-interface
vbond(config-tunnel-interface)# encapsulation ipsec
vbond(config-tunnel-interface)# allow-service all
vbond(config-tunnel-interface)# commit vbond(config-tunnel-interface)# exit vbond(config-interface-ge0/0)# exit |
Configure the interface to be a secure DTLS or TLS WAN transport connection
Configure the services that are allowed to run over the WAN connection in VPN 0 |
| Step 5 |
vmanage(config-vpn-0)# ip route 0.0.0.0/0 IP address vmanage(config-vpn-0)# commit |
Establish a static route to the gateway IP address
Example: ip route 0.0.0.0/0 128.0.0.1 |
A summary of the above commands, with an example configuration:
configure terminal for vManage and vSmart vpn 0 interface eth0 ip address 128.0.0.5/24 no shutdown tunnel-interface allow-service all commit
exit
exit
ip route 0.0.0.0/0 128.0.0.1
commit
configure terminal for vBond vpn 0 interface ge0/0 ip address 128.0.0.3/24 no shutdown tunnel-interface
encapsulation ipsec allow-service all commit exit exit ip route 0.0.0.0/0 128.0.0.1 commit
Configure Controller Certificates
- Login to the vManage web console, by navigating to “https://<vManage Public IP Address>:8443” in a web browser
- Once the vManage Dashboard has loaded, navigate to the Administration menu on the right, then select “Settings"
- Configure the Organization Name to match the one that was configured on each controller through the CLI
- Enter the address that was configured for vBond, with the default port “12346” unless an alternate port was configured
- There are many certificate authorization options available, such as using a Cisco Smart Account to automatically sign certificates. For the purposes of this configuration guide, we will select “Enterprise” for Controller Certificate Authorization, to use a custom Root Certificate Authority for signing controller certificates
- To begin the process of creating a root certificate, access the certificate-signing server/software on a compatible workstation that has network access to the three controllers
NOTE: There are many free options for creating and signing certificates, and each will work with the SD-WAN controllers, however, this guide will cover how to do so using the xca certificate-signing software, which is also available for free.
- Select “File” > “New Database” and specify a name to create a new .xdb database. Click “Save"
- Navigate to the “Certificates” tab in xca, then select “New Certificate” on the right
- On the “Source” tab, In the field, “Template for the new certificate” select “[default] CA” then click “Apply extensions,” “Apply subject,” and “Apply all”
- On the Subject tab, enter the name “RootCA” in the field for Internal Name. Fill out the remaining details in correspondence with your organization. The “organizationName” and “organizationalUnitName” fields must be identical and should match the organization name configured previously on each of the controllers, as well as the vManage web console
- Click “Generate a new key” to generate the private key for the root certificate. Click “Create” to generate the key
- Click “OK” at the bottom right corner of the window to create the root certificate
- After the certificate has been created, select it and click “Export” on the right to save the certificate in PEM (.crt) format
- Using a Terminal window, navigate to the directory where the exported root certificate was stored
- Open the certificate using vim by entering “vim rootca.crt” in the Terminal window. Copy all of the certificate text, including the “Begin Certificate” and “End Certificate” line
- Navigating back to the vManage console, paste the contents of the root certificate into the setting for “Controller Certificate Authorization” and click “Import & Save”
- Open a new Terminal window, and SSH into vManage "ssh admin@vManage IP Address", using the same IP address and credentials used to login to the vManage GUI
- Enter the “vshell” command to enter the virtual shell on vManage. Then, navigate to the admin directory by entering the command “cd /home/admin”
- Enter the command “vim root.crt” to enter VIM and create a new blank file, titled “root.crt” in order to be able to install the root certificate chain on the controller
- Enter Insert Mode in VIM by entering the command “i” then paste the contents of the RootCA certificate, copied from Step 15, into this blank file. Save the file by hitting the escape key, and then entering the command “:wq”
- Enter the command “exit” to exit the virtual shell. Install the root certificate chain by entering the command “request root-cert-chain install /home/admin/root.crt”
- Repeat Steps 17-21 for establishing an SSH session with vSmart and vBond to install the root certificate on each controller
- Return to the vManage web console. Use the menu on the left to Navigate to “Configuration” > “Certificates.” Select “Controllers” at the top of the page
- Click the three dots at the right of the vManage line to open the options menu for the vManage certificate. Click “Generate CSR” to generate the certificate signing request for vManage
- Click “Download” to download the CSR. Rename the downloaded CSR file to match the name of the controller the CSR is for: vManage.csr, vSmart.csr, or vBond.csr
- Return to xca to sign the CSR. To begin, select the “Certificate Signing Requests” tab at the top of the window. Then click “Import” on the right to import the CSR that was downloaded from the vManage web GUI
- Once imported, right click the name of the CSR inside of the xca window and click “Sign” to begin signing the certificate
- On the “Source” tab, under the field “Signing” ensure that the RootCA certificate that was created previously is selected as the certificate to be used for signing
- In the field, “Template for the new certificate” select “[default] HTTPS_client” then click “Apply extensions,” “Apply subject,” and “Apply all”
- On the “Extensions” tab, in order to ensure that the certificate becomes valid immediately once installed on the controller, the time should be updated to be the current time on the respective controller, at this time when the certificate is being signed
- Utilizing the “show clock” command when accessing the controller through a CLI will show the current time of the controller. Configure the time in xca, in the “Not before” field to be the same time
- Click “Apply” on the right to update the “Not after” field to reflect the updated time. Then click “OK” at the bottom of the window to sign the certificate
- After signing the certificate, select the “Certificates” tab at the top of the window in xca. Click the drop-down arrow to the left of the RootCA certificate that was generated earlier. The certificate that was just signed should now appear underneath the root certificate
- Right click the certificate whose name corresponds to the controller for which the certificate is being signed for (vManage, vSmart, vBond) and select “Export” > “Clipboard”
NOTE: In order to use a different workstation to sign certificates in the future, you must export the original RootCA certificate as a “File” and then for the Export Option select “PEM + Key” to get a single PEM file containing the certificate contents as well as the private key
- Returning to the Certificates page on the vManage web console, click “Install Certificate” in the top right corner of the page
- Paste the contents of the signed certificate that were just copied from xca and then click “Install” to install the certificate for the controller
- After the certificate installation has finished, there should be a message indicating that it was successful
- Next, use the menu on the left of the vManage console to navigate to “Configuration” > “Devices”. Select “Controllers” at the top of the page
- Click “Add Controller” and select “vBond"
- Enter vBond VPN0 IP address for vBond that was previously configured through the CLI, as well as the credentials that are used for logging into vBond
- Ensure that the “Generate CSR” box is NOT checked, then click “Add” to add the controller
- Repeat steps 39-41 to add the vSmart controller as well
- Repeat steps 23-37 to generate the CSRs, as well as sign and then install the certificates for both vBond and vSmart
Verification
Upon completing the controller setup and certificate installation, the vManage web console dashboard should indicate that each of the three controllers (vManage, vSmart, and vBond) are up and reachable. Additionally, the dashboard should indicate that there are no invalid certificates.
The Certificate Configuration page on the web console should also indicate that the certificate has been installed on vBond and that vBond has been updated for vSmart and vManage. All three controllers should have a certificate serial and their vEdge List Status should be in “Sync”.
Using the “show control connections” command while an SSH connection to one of the controllers has been established can be useful in troubleshooting connection issues between controllers. The command should return a list of successful connections to the other controllers.
Troubleshooting
Troubleshoot Control Connections: https://community.cisco.com/t5/networking-documents/sd-wan-routers-troubleshoot-control-connections/ta-p/3813237
Adding a WAN Edge to the SD-WAN Fabric
